Winny is a hardener. It is used to bring out muscle density and things of the like, but it will only do this with a low enough bf &. I would say save it for the last 5 weeks of the cycle and actually I would begin it at week 9-14. I could be wrong on the timing issue as I have never used sust before. Idealy you want the winny to end and the PCT to begin a few days thereafter. You might want to wait until week 10 to start the winny, but like I said I haven't used sust before. BUMP for info.